The APA defines schizophrenia by the presence of two or more of the following, each present for a significant portion of time during a one-month period: (1) delusions (2) hallucinations (3) disorganized speech (4) grossly disorganized or catatonic behavior (5) negative symptoms i.e. affective flattening, alogia or avolition Signs of the disturbance must have been… Continue Reading